linux-kernel - Re: [PATCH 1/3] serial: 8250_early: Add earlycon support for AMD Carrizo / Stoneyridge

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Date:   Wed, 14 Mar 2018 11:53:43 +0100
From:   Ricardo Ribalda Delgado <ricardo.ribalda@...il.com>
To:     Daniel Kurtz <djkurtz@...omium.org>
Cc:     adurbin@...omium.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jslaby@...e.com>,
        Marc Gonzalez <marc_gonzalez@...madesigns.com>,
        Douglas Anderson <dianders@...omium.org>,
        Matt Redfearn <matt.redfearn@...s.com>,
        Jeffy Chen <jeffy.chen@...k-chips.com>,
        "open list:SERIAL DRIVERS" <linux-serial@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/3] serial: 8250_early: Add earlycon support for AMD
 Carrizo / Stoneyridge

Hi Daniel


On Wed, Mar 14, 2018 at 1:36 AM, Daniel Kurtz <djkurtz@...omium.org> wrote:
>
> AMD Carrizo / Stoneyridge use a DesignWare 8250 UART that uses a 48 MHz
> input clock.
>
> Allow these platforms to set up this clock by specifying a kernel command
> line like:
> earlycon=amdcz,mmio32,0xfedc6000,115200


If the port and the mode (mmio32) is always fixed, couldn't we just
add those two into
early_amdcz_setup?


Thanks!